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Proton-electron mixed conductor hydrogen permeable membrane and its preparation method and hydrogen permeable membrane reactor

A technology of mixed conductors and electronic conductors, which is applied in the field of hydrogen permeable membrane reactors, can solve the problems of not being able to be used as hydrogen permeable membranes, lack of electron transfer channels, and inability to realize hydrogen purification, so as to improve energy utilization and high hydrogen permeation rate , Increase the effect of practicality

Active Publication Date: 2021-09-21
SHANDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] This material has been applied as a low temperature fuel cell proton exchange membrane, but PBI / H 3 PO 4 It only provides a proton transfer pathway, but lacks an electron transfer channel, so it cannot be used as a hydrogen permeable membrane and cannot purify hydrogen

Method used

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  • Proton-electron mixed conductor hydrogen permeable membrane and its preparation method and hydrogen permeable membrane reactor
  • Proton-electron mixed conductor hydrogen permeable membrane and its preparation method and hydrogen permeable membrane reactor
  • Proton-electron mixed conductor hydrogen permeable membrane and its preparation method and hydrogen permeable membrane reactor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Pour 1g of polybenzimidazole (mPBI) and 10mL of dimethylacetamide (DMAC) into the flask, heat the electric heating mantle at 120°C, stir magnetically for 8h, then add 0.063g (5%) graphite and 5mL of dimethylacetamide ( DMAC) magnetically stirred for 8 hours, and finally added 0.20 g (20%) of triglycidyl isocyanurate (TGIC) as a cross-linking agent, heated at 60° C. with an electric heating mantle, and magnetically stirred for 2 hours to obtain a mixed solution. The mixed solution was ultrasonically oscillated for 30 min to remove air bubbles. Cast the mixed solution on a glass plate in an oven at 60°C to form a film. After 2 hours, the solvent evaporates. The temperature is raised to 160°C and kept for 5-6 hours. Finally, the film is taken out and soaked in deionized water until the film falls off naturally.

[0044] Cut the membrane into discs with a radius of 0.5 cm and soak the membrane in 1mol / L phosphoric acid for 24 hours, take out the surface of the membrane and ...

Embodiment 2-3

[0054] Examples 2-3 are the same as Example 1, the only difference is that the amount of crosslinking agent added is 0.25g (25%) and 0.30g (30%) respectively, and the mechanical strength is shown in Table 3.

[0055] table 3

[0056] Example 1 Example 2 Example 3 Cross-linking agent (%) 20％ 25％ 30％ Mechanical strength (MPa) 4.463 6.55 9.53

Embodiment 4

[0058] Pour 1g of polybenzimidazole (mPBI) and 10mL of dimethylacetamide (DMAC) into the flask, heat the electric heating mantle at 120°C, stir magnetically for 8h, then add 0.14g (10%) graphene and 5mL of dimethylacetamide (DMAC) magnetic stirring for 8 hours, and finally adding 0.25 g (25%) of triglycidyl isocyanurate (TGIC) as a cross-linking agent, heating at 60° C. with an electric heating mantle, and magnetic stirring for 2 hours to obtain a mixed solution. The mixed solution was ultrasonically oscillated for 30 min to remove air bubbles. Cast the mixed solution on a glass plate in a 60°C oven to form a film. After 2 hours, the solvent evaporates; raise the temperature to 160°C and keep it for 5-6 hours. Finally, take out the film and soak it in deionized water until the film falls off naturally.

[0059] Cut the membrane into discs with a radius of 0.5 cm and soak the membrane in 1mol / L phosphoric acid for 24 hours, take out the surface of the membrane and brush with Pt...

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Abstract

The invention belongs to the field of gas separation engineering, and in particular relates to a proton-electron mixed conductor hydrogen permeable membrane, a preparation method thereof and a hydrogen permeable membrane reactor. Using polybenzimidazole, electronic conductor, and triglycidyl isocyanurate as raw materials, the electronic conductor is graphite or graphene, and dimethylacetamide is used as the solvent. After the raw materials and the solvent are mixed and dissolved, PBI / electronic conductor is prepared. / TGIC cross-linked composite film; then soaked in concentrated phosphoric acid or phosphate solution to obtain PBI / electronic conductor / TGIC / H 3 PO 4 Cross-linked composite membrane; then brush-coat Pt, Pd or Ag catalyst on the surface to obtain a proton-electron mixed conductor hydrogen permeable membrane. High hydrogen permeation rate, high mechanical strength, strong oxidation resistance, suitable for medium and low temperature environments, good thermal, chemical stability and oxidation resistance and other advantages; the invention also provides its preparation method with mild conditions and low cost ; The hydrogen permeable membrane can construct a high-efficiency medium and low temperature hydrogen permeable membrane reactor.

Description

technical field [0001] The invention belongs to the field of gas separation engineering, and in particular relates to a proton-electron mixed conductor hydrogen permeable membrane, a preparation method thereof and a hydrogen permeable membrane reactor. Background technique [0002] Hydrogen is an important chemical raw material, which is widely used in petroleum refining and methane production. In addition, hydrogen is a clean, pollution-free and sustainable energy source, and the energy density of hydrogen (120MJ / Kg) is almost three times that of gasoline (40MJ / Kg), so hydrogen energy is expected to become a substitute for fossil fuels Taste. Pressure swing adsorption, cryogenic separation and membrane separation are common hydrogen separation technologies. Among them, the advantages of membrane separation technology, such as low energy consumption, easy operation and small footprint, have become a research hotspot in recent years. Traditional ceramic membrane materials ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D71/58B01D67/00B01D53/22C01B3/56
CPCB01D53/228B01D67/0006B01D71/58C01B3/56
Inventor 孟秀霞高波杨乃涛孟波靳昀张津津于方永
Owner SHANDONG UNIV OF TECH
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